CN106339120A - Touch detection device and display device with touch detection function - Google Patents

Touch detection device and display device with touch detection function Download PDF

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Publication number
CN106339120A
CN106339120A CN201610531780.1A CN201610531780A CN106339120A CN 106339120 A CN106339120 A CN 106339120A CN 201610531780 A CN201610531780 A CN 201610531780A CN 106339120 A CN106339120 A CN 106339120A
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CN
China
Prior art keywords
touch
metal wiring
electrode
conductive layer
touching
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Granted
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CN201610531780.1A
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Chinese (zh)
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CN106339120B (en
Inventor
仓泽隼人
石崎刚司
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Japan Display Central Inc
Japan Display Inc
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Japan Display Central Inc
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material

Abstract

The invention provides a touch detection device and a display device with a touch detection function, aiming at imcreasing tolerance of electromagnetic noise, such as static electricity. The touch detection device and a display device with a touch detection function include: a substrate; a touch detection electrode that is arranged on a plane parallel with the substrate, and that includes a plurality of wires arranged at intervals from one another; and a conductive layer that has a sheet resistance value larger than that of the wires, and that is in contact with and overlaps the wires.

Description

Touch detecting apparatus and the display device with touching detection function
Technical field
The present invention relates to outside display device and the touch detecting apparatus detecting function close to object with touch can be detected.
Background technology
In recent years, be referred to as so-called touch panel, can detect that the outside touch detecting apparatus close to object are closed Note.Touch panel assembles or integration, the display dress with touching detection function in the display devices such as liquid crystal indicator Put middle use.And, with touch detection function display device pass through in a display device show various button image etc. thus Touch panel can be made to replace common mechanical botton and to carry out information input.In following patent documentation 1, describe for reality Now slimming, large screen or fine definition and in touching detecting electrode using metal material, enable to touch detection electricity The low resistance of pole and suppress pattern visibility with touch detection function display device.
Prior art literature
Patent documentation
Patent documentation 1: JP 2014-109904 publication
Content of the invention
Problems to be solved by the invention
The touch detecting electrode of the display device with touching detection function described in patent documentation 1 has the gold of narrow width Belong to distribution, the area touching detecting electrode is little.Therefore, overlapping with touching detecting electrode from electromagnetic noises such as outside electrostatic In the case of, the electric charge that touch detecting electrode is carried is difficult to touch the display of accuracy of detection or display device to flows outside Performance is likely to decrease.
It is an object of the invention to provide the touch detecting apparatus of the patience to electromagnetic noises such as electrostatic can be improved and carry tactile Touch the display device of detection function.
For solution to problem
The touch detecting apparatus of one mode of the present invention possess: substrate；Touch detecting electrode, its located at aforesaid substrate On parallel face, there are many metal wirings, many above-mentioned metal wirings configure in the way of arranging interval；And conductive layer, It has the sheet resistance value higher than above-mentioned metal wiring, connects and overlapping with above-mentioned metal wiring with above-mentioned metal wiring.
The display device with touching detection function of one mode of the present invention has: above-mentioned touch detecting apparatus；Multiple Pixel electrode, its on the face parallel with aforesaid substrate relative with above-mentioned touch detecting electrode and press matrix configuration；And display Functional layer, it is based on picture signal and plays image display function.
Brief description
Fig. 1 is the block diagram of the configuration example of the display device with touching detection function representing the 1st embodiment.
Fig. 2 is that ultimate principle, the expression finger of the touch detection for mutual electrostatic capacitance mode is described are not in contact with Or the explanatory diagram of close state.
Fig. 3 be represent the finger shown in Fig. 2 be not in contact with or the close example of the equivalent circuit of state explanatory diagram.
Fig. 4 be for illustrate mutual electrostatic capacitance mode touch detection ultimate principle, represent finger contact or The explanatory diagram of close state.
Fig. 5 is the explanatory diagram of the example of the equivalent circuit of the state representing that the finger shown in Fig. 4 touchs or proximates to.
Fig. 6 is the figure of of the waveform representing drive signal and touching detection signal.
Fig. 7 is the one, table representing the module of the display device with touching detection function being provided with the 1st embodiment Show the plane graph of of drive electrode.
Fig. 8 is the one, table representing the module of the display device with touching detection function being provided with the 1st embodiment Show the plane graph of that touches detecting electrode.
Fig. 9 is the sectional view of the outline cross section structure representing the display device with touching detection function.
Figure 10 is the circuit diagram of the pixel arrangement of the display part with touching detection function representing the 1st embodiment.
Figure 11 is the color region with colored filter for the arrangement of the touch detecting electrode for the 1st embodiment is described The schematic diagram of relation.
Figure 12 is to represent the drive electrode of the display part with touching detection function of the 1st embodiment and touch detecting electrode A configuration example axonometric chart.
The signal of of the configuration during Figure 13 is the display action representing during 1 frame and during touch detection action Figure.
Figure 14 is the process chart of the manufacture method for the conductive layer of the 1st embodiment and touch detecting electrode are described.
Figure 15 is the touch detecting electrode of the display device with touching detection function of the embodiment representing present embodiment Schematic plan view.
Figure 16 is to represent the relation touching the configuration area occupation ratio with respect to conductive layer for the detecting electrode and touch detection action Table.
Figure 17 is the schematic plan view of of the display device with touching detection function representing the 2nd embodiment.
Figure 18 is the section of the outline cross section structure of the display device with touching detection function representing the 2nd embodiment Figure.
Figure 19 is the schematic plan view of of the display device with touching detection function representing the 3rd embodiment.
Figure 20 is partly to amplify the touch detecting electrode of the display device with touching detection function for the 3rd embodiment The schematic plan view representing afterwards.
Figure 21 is the section of the outline cross section structure of the display device with touching detection function representing the 3rd embodiment Figure.
Figure 22 be for explanation from electrostatic capacitance mode touch detection ultimate principle, represent finger be not in contact with or The explanatory diagram of the close state of person.
Figure 23 is to contact from the ultimate principle, the expression finger that touch detection of electrostatic capacitance mode for explanation or connect The explanatory diagram of near state.
Figure 24 is the figure of of the waveform representing drive signal and touching detection signal.
Figure 25 is the schematic plan view of of the display device with touching detection function representing the 4th embodiment.
Figure 26 is to represent after the touch detecting electrode amplification of the display device with touching detection function for the 4th embodiment Schematic plan view.
Figure 27 be Figure 26 the cut-out of use b-b line after schematic section when the direction of arrow is watched.
Figure 28 is the section of the outline cross section structure of the display device with touching detection function representing the 4th embodiment Figure.
Specific embodiment
On one side referring to the drawings, explain the mode (embodiment) for implementing the present invention.The present invention does not limit In the content described in following embodiment.In addition, comprising those skilled in the art in following described element Content that can be easy to imagine that, substantially the same.And, described element can suitably be combined below.This Outward, open only one eventually, those skilled in the art can readily appreciate that with regard to protecting the suitable change of the objective invented Content certainly comprise within the scope of this invention.In addition, in order to clearly state further, accompanying drawing compared with actual mode, Sometimes schematically show the width in each portion, thickness, shape etc., but it is one eventually, explanation of the invention is not limited Fixed.In addition, in this specification and each in figure, the figure with regard to having gone out marks same accompanying drawing mark to the key element same with foregoing teachings Note, suitably omits detailed description sometimes.
(the 1st embodiment)
Fig. 1 is the block diagram of the configuration example of the display device with touching detection function representing the 1st embodiment.As Fig. 1 institute Show, the display device 1 with touching detection function possesses: the display part 10 with touch detection function, control unit 11, gate drivers 12nd, source electrode driver 13, drive electrode driver 14 and touch test section 40.Display device 1 with touching detection function Display part 10 with touching detection function is the built-in display device touching detection function.Display part 10 with touching detection function It is that the touch detecting apparatus of the display floater using liquid crystal display cells as display element 20 and detection touch input are touched Touch the device that panel 30 achieves integration.Additionally, can also be in display floater 20 with touching the display part 10 detecting function On be assembled with touch panel 30, on so-called unit (on-cell) type device.Additionally, display floater 20 for example also may be used To be organic el display floater.
Display floater 20 is with 1 level every time as described later according to scanning signal vscan from gate drivers 12 supply The element that the mode of line scans successively and shown.Control unit 11 is by controlling the video letter making based on from outside supply Number vdisp to gate drivers 12, source electrode driver 13, drive electrode driver 14 and touches test section 40 and supplies control respectively Signal and make they be mutually in step ground action circuit.
Gate drivers 12 have based on the control signal supplied from control unit 11 successively be selected as band touch detection work( 1 horizontal function of the object that the display of the display part 10 of energy drives.
Source electrode driver 13 is to the display part 10 with touching detection function based on the control signal supplied from control unit 11 , each sub-pixel spix described later supply the circuit of picture element signal vpix.
Drive electrode driver 14 is to the display with touching detection function based on the control signal supplied from control unit 11 Drive electrode coml portion 10, described later supplies the circuit of drive signal vcom.
Touch panel 30 touches the ultimate principle action of detection based on capacitance type, is entered by mutual electrostatic capacitance mode Row touches detection action, conductor the touching or proximating to respect to viewing area outside detection.
Touch the touch inspection that test section 40 is based on the control signal supplied from control unit 11 with from touch panel 30 supply Survey signal vdet1 to detect the circuit of the presence or absence of touch to touch panel 30.In addition, touching test section 40 having the feelings of touch Coordinate carrying out touch input etc. is obtained under condition.This touch test section 40 possesses: touches detection signal enlarging section 42, a/d conversion Portion 43, signal processing part 44, coordinate extracting part 45 and detection timing control part 46.
As described above, touch panel 30 touches the ultimate principle action of detection based on capacitance type.Here, with reference to Fig. 2 ～Fig. 6 illustrates the touch inspection based on mutual electrostatic capacitance mode of the display device 1 with touching detection function of present embodiment The ultimate principle surveyed.Fig. 2 is that ultimate principle, the expression finger of the touch detection for mutual electrostatic capacitance mode is described do not have The explanatory diagram of the state touching or proximating to.Fig. 3 be represent the finger shown in Fig. 2 be not in contact with or close state equivalence The explanatory diagram of the example of circuit.Fig. 4 is the ultimate principle, the expression handss that touch detection for mutual electrostatic capacitance mode is described Abutment or the explanatory diagram of close state.Fig. 5 is the electricity of equal value of the state representing that the finger shown in Fig. 4 touchs or proximates to The explanatory diagram of the example on road.Fig. 6 is the figure of of the waveform representing drive signal and touching detection signal.Additionally, following In explanation, the situation that finger touchs or proximates to is described, but is not limited to finger or includes the conductors such as such as writing pencil Object.
For example as shown in Fig. 2 capacity cell c1 possesses a pair of electrodes across electrolyte d mutually relative configuration, drive electricity Pole e1 and touch detecting electrode e2.As shown in figure 3, one end of capacity cell c1 is connected with alternating message source (source driving signal) s, The other end is connected with voltage detector (touch test section) det.Voltage detector det is, for example, the touch detection letter shown in Fig. 1 Number integrating circuit that enlarging section 42 is comprised.
(for example count khz drive electrode e1 (one end of capacity cell c1) being applied with the frequency of regulation from alternating message source s ～hundreds of khz degree) ac square wave sg when, via with touch detecting electrode e2 (other end of capacity cell c1) side be connected Voltage detector det assume output waveform shown in Fig. 6 (touching detection signal vdet1).Additionally, this ac square wave sg phase When in the drive signal vcom inputting from drive electrode driver 14.
It is not in contact with or under the state (contactless state) of touch panel in finger, as shown in Figures 2 and 3, with To the discharge and recharge of capacity cell c1 concomitantly, electric current i corresponding with the capacitance of capacity cell c10Flowing.Voltage shown in Fig. 3 Detector det will electric current i corresponding with ac square wave sg0Variation be converted to variation (the waveform v of solid line of voltage0(reference Fig. 6)).
On the other hand, under the state (contact condition) of finger contact (or close), as shown in figure 4, being formed by finger Electrostatic capacitance c2 due to touch detecting electrode e2 contact or be located at touch detecting electrode e2 vicinity, positioned at drive electrode The electrostatic capacitance of the amount at edge between e1 and touch detecting electrode e2 is blocked.Therefore, capacity cell c1 is as capacitance ratio The capacity cell c1' that the capacitance of contactless state is little works.And if, the equivalent circuit shown in Fig. 5, then in electric capacity unit Electric current i in part c1'1Flowing.As shown in fig. 6, voltage detector det will electric current i corresponding with ac square wave sg1Variation turn It is changed to variation (the waveform v of dotted line of voltage1).In this case, waveform v1With above-mentioned waveform v0Compare amplitude to diminish.Thus, Waveform v0With waveform v1Voltage differential absolute value | δ v | according to finger etc. from the impact of external contact or close conductor And change.Additionally, for precision detection waveform v well0With waveform v1Voltage differential absolute value | δ v |, voltage examine Survey device det correspondingly to carry out being provided with the discharge and recharge resetting capacitor by the frequency of the switch in circuit and ac square wave sg The action of period reset, this is preferred.
Touch panel 30 shown in Fig. 1 is according to the drive signal vcom supplying from drive electrode driver 14 with every time 1 inspection The mode surveying block scans successively, carries out the touch detection based on mutual electrostatic capacitance mode.
Touch panel 30 is from multiple touch detecting electrode tdl described later via the voltage detector shown in Fig. 3 or Fig. 5 Det presses each detection block output and touches detection signal vdet1, is supplied to the touch detection signal amplification touching test section 40 Portion 42.
Touch detection signal enlarging section 42 to amplify the touch supplied from touch panel 30 detection signal vdet1.Additionally, touching Touch detection signal enlarging section 42 and can also possess and will touch radio-frequency component (noise contribution) removing that detection signal vdet1 is comprised And the low-pass analog filter exporting simulates lpf (low pass filter).
The mould that a/d converter section 43 will be exported from touch detection signal enlarging section 42 by the timing synchronous with drive signal vcom Intend being converted to digital signal after signal is sampled respectively.
Signal processing part 44 possess that the output signal of a/d converter section 43 is comprised, drive signal vcom is carried out The digital filter that frequency content (noise contribution) beyond the frequency of sampling reduces.Signal processing part 44 is based on a/d conversion The output signal in portion 43 detects the logic circuit of the presence or absence of the touch to touch panel 30.Signal processing part 44 is only taken out base Process in the difference of the detection signal of finger.The signal of the difference based on this finger is above-mentioned waveform v0With waveform v1Difference Absolute value | δ v |.Signal processing part 44 can also enter the absolute value being about to every 1 detection block | δ v | the computing of equalization, obtains The meansigma methodss of absolute value | δ v |.Thus, signal processing part 44 can reduce the impact being brought by noise.Signal processing part 44 will be examined The signal of the difference based on finger measured is compared with the threshold voltage of regulation, if less than this threshold voltage, being judged as Outside is contactless state close to object.On the other hand, signal processing part 44 by the digital voltage detecting with regulation threshold value Voltage is compared, if more than threshold voltage, is then judged as the outside contact condition close to conductor.So touch test section 40 Can carry out touching detection.
Coordinate extracting part 45 is to obtain the logic electricity of this touch panel coordinate when detecting touch by signal processing part 44 Road.Detection timing control part 46 is controlled such that a/d converter section 43, signal processing part 44 and the synchronous earthquake of coordinate extracting part 45 Make.Coordinate extracting part 45 is using touch panel coordinate as detection signal output vout output.
Fig. 7 and Fig. 8 is represent the module of the display device with touching detection function being provided with the 1st embodiment one Plane graph.Fig. 7 is the plane graph of that represents drive electrode, and Fig. 8 is the plane graph of that represents touch detecting electrode.
As shown in fig. 7, the display device 1 with touching detection function possesses tft (thin film transistor: thin film Transistor) substrate 21 and flexible printing substrate 72.Tft substrate 21 is formed with carrying cog (chip on glass: core on glass Piece) 19 and corresponding with frame region 10b of the viewing area 10a and encirclement viewing area 10a of display floater 20 (with reference to Fig. 1) Region.Cog19 is mounted to the chip of the ic driver of tft substrate 21, is built-in with the control unit 11 shown in Fig. 1, grid drives Each circuit needed for dynamic device 12, source electrode driver 13 etc., display action.In addition, in the present embodiment, drive electrode driver 14 can also be formed at the tft substrate 21 as glass substrate.Cog19 and drive electrode driver 14 are located at frame region 10b. Additionally, cog19 can also built-in drive electrode driver 14.In this case, can constriction frame region 10b.Flexible printing Substrate 72 is connected with cog19, is fed to video signal vdisp or supply voltage from outside via flexible printing substrate 72 cog19.
As shown in fig. 7, with touch detection function display part 10 be provided with the region overlapping with viewing area 10a multiple Drive electrode coml.Multiple drive electrode coml extend in the direction of the minor face along viewing area 10a respectively, along display The direction on the long side of region 10a is arranged in the way of arranging interval.Multiple drive electrode coml respectively with drive electrode driver 14 connections.
As shown in figure 8, the display device 1 with touching detection function is also equipped with glass substrate 31 and flexible printing substrate 71. The vertical direction on the surface of tft substrate 21 shown in Fig. 7 for the glass substrate 31 is relative with tft substrate 21.As shown in figure 8, band touches The display part 10 touching detection function is provided with multiple touch detecting electrode tdl in the region overlapping with viewing area 10a.Multiple tactile Touch the direction extension that detecting electrode tdl intersects respectively in the bearing of trend with the drive electrode coml shown in Fig. 7.In addition, it is multiple Touch detecting electrode tdl to arrange in the way of arranging interval in the bearing of trend of drive electrode coml.That is, multiple drive electrodes Coml and multiple touch detecting electrode tdl is configured in clover leaf mode, forms electrostatic capacitance in overlapped part.
With touching the display device 1 of detection function as described later when carrying out display action, in every time 1 horizontal mode Scanned successively.That is, the display device 1 with touching detection function and 1 side along the display part 10 with touching detection function Direction abreast carry out display scanning (with reference to Fig. 8).On the one hand the display device 1 with touching detection function is carrying out touching inspection From drive electrode driver 14, drive signal vcom is applied successively to drive electrode coml during survey action thus with 1 detection line every time Mode scanned successively.That is, detect the display part 10 of function and along the display part 10 with touching detection function with touch The direction on other sides abreast carry out touching detection scanning (with reference to Fig. 7).
As shown in figure 8, the touch detecting electrode tdl of present embodiment has many metal wiring 33a～33d.Metal is joined Line 33a～33d is respectively provided with the fine rule piece u1 tilting with respect to the direction parallel with the long side of viewing area 10a and fine rule piece U2, fine rule piece u1 and fine rule piece u2 mutually tilt in the opposite direction.Fine rule piece u1 and fine rule piece u2 is with viewing area 10a's The parallel direction in long side alternately and repeatedly configures, and fine rule piece u1 and fine rule piece u2 is turned back even by bending section 33r, bending section 33s Connect.So metal wiring 33a～33d is formed as thering is bending section 33r, the jaggies of bending section 33s or wave.Fine rule piece U1 and fine rule piece u2 is linear, but not limited to this or curve-like.
Many metal wiring 33a～33d are narrow width respectively, in the 10a of viewing area, with metal wiring 33a～33d Bearing of trend intersect direction (short side direction of viewing area 10a) by mutual setting interval in the way of configure.Many metals The two ends of bearing of trend of distribution 33a～33d are connected with welding disk 34a, 34b of being configured at frame region 10b.Thus, many Metal wiring 33a～33d is electrically connected to each other, as 1 touch detecting electrode tdl function.Multiple welding disk 34b are respectively It is connected to distribution 37, touch detecting electrode tdl and wired 37 connections of flexible printing substrate 71.
Metal wiring 33a～33d is by least 1 in aluminum (al), copper (cu), silver-colored (ag), molybdenum (mo) or their alloy Plant metal material to be formed.In addition, metal wiring 33a～33d can also be set to using more than a kind and be laminated above-mentioned metal material There are multiple duplexers.At least one metal material in aluminum (al), copper (cu), silver-colored (ag) or their alloy is as transparent The material of electrode is than low resistance of transparent conductive oxide such as ito (indium tin oxide: indium tin oxide).Aluminum (al), at least one metal material in copper (cu), silver-colored (ag) or their alloy and the transparent conductive oxide phases such as ito Ratio has light-proofness, therefore there is a possibility that decrease in transmission or touches the possibility that the pattern of detecting electrode tdl is seen Property.In the present embodiment, 1 touches metal wiring 33a～33d that detecting electrode tdl has multiple narrow width, metal wiring 33a～33d is configured thus enabling low resistance and not visibleization in the way of arranging the interval bigger than live width.As a result, Touch detecting electrode tdl and enable low resistance, the display device 1 with touching detection function enables slimming, large screen Or fine definition.
The width of preferably metal wiring 33a～33d is in the scope of more than 2 μm and less than 10 μm.Its reason is, if metal The width of distribution 33a～33d is less than 10 μm, then the area of the covering peristome in the 10a of viewing area diminishes, above-mentioned peristome It is the region of the transmission that cannot suppress light by black matrix or scan signal line gcl described later and pixel signal line sgl, infringement The probability step-down of aperture opening ratio.If in addition, the width of metal wiring 33a～33d be more than 2 μm, dimensionally stable, broken string can Energy property is low.
Fig. 9 is the sectional view of the outline cross section structure representing the display device with touching detection function.As shown in figure 9, band The display part 10 touching detection function possesses: pixel substrate 2；In the direction relative configuration vertical with the surface of this pixel substrate 2 Opposing substrate 3；And it is inserted in the liquid crystal layer 6 between pixel substrate 2 and opposing substrate 3.
Pixel substrate 2 includes: as the tft substrate 21 of circuit substrate；With the rectangular top being disposed in this tft substrate 21 Multiple pixel electrodes 22；It is formed at the multiple drive electrode coml between tft substrate 21 and pixel electrode 22；And make pixel Electrode 22 and the insulating barrier 24 of drive electrode coml insulation.It is provided with polarization plates 65 in the downside of tft substrate 21 across adhesive linkage 66.
Opposing substrate 3 includes glass substrate 31 and is formed at the colored filter 32 of the one side of this glass substrate 31.In glass It is provided with conductive layer 36 in the another side of glass substrate 31, touching of the detecting electrode as touch panel 30 is formed with conductive layer 36 Touch detecting electrode tdl.And, on this touch detecting electrode tdl, it is provided with the metal touching detecting electrode tdl for protection and joins The protective layer 38 of line 33a～33d.Protective layer 38 can use the translucent resins such as acrylic resin.On protective layer 38 across Adhesive linkage 39 is provided with polarization plates 35.
Tft substrate 21 and glass substrate 31 pass through the interval relative configuration of sept 61 setting regulation.By tft substrate 21st, the space of glass substrate 31 and sept 61 encirclement is provided with liquid crystal layer 6.Liquid crystal layer 6 passes through it according to the state modulation of electric field Light, for example using application include the transverse electric field modes such as the ips (in-plane switching) of ffs (fringing field switching) liquid crystal display surface Plate.In addition it is also possible to distinguish between the liquid crystal layer 6 shown in Fig. 9 and pixel substrate 2 and between liquid crystal layer 6 and opposing substrate 3 Arrange alignment films.
As shown in figure 9, being provided with conductive layer 36 above glass substrate 31, touch detecting electrode is provided with conductive layer 36 Tdl (metal wiring 33a～33d).Conductive layer 36 is directly connected to the metal wiring 33a～33d touching detecting electrode tdl, with Metal wiring 33a～33d is overlapping.Conductive layer 36 is formed at the substantially entire surface of glass substrate 31, covers the whole of viewing area 10a Individual face and frame region 10b (with reference to Fig. 8) and be continuously provided.That is, conductive layer 36 have overlapping with metal wiring 33a～33d Part and not with metal wiring 33a～overlapping part of 33d, not the part overlapping with metal wiring 33a～33d join adjacent Metal wiring 33a～the 33d putting is connected to each other.In addition, as shown in Figure 8 and Figure 9, preferably conductive layer 36 located at welding disk 34a, 34b and the position of distribution 37 overlap.
In the case of being not provided with conductive layer 36, when the electromagnetic noises such as electrostatic are from outside intrusion, due to metal wiring 33a ～33d is low resistance and is narrow width, and the electric charge that therefore metal wiring 33a～33d is carried is not readily removable.Accordingly, there exist by In the electrostatic of metal wiring 33a～33d so that the orientation of the liquid crystal of liquid crystal layer 6 is changed and display floater 20 display quality The probability that reduces or change and make the touch accuracy of detection of touch panel 30 drop due to touching detection signal vdet1 Low probability.In the present embodiment, can be carried by conductive layer 36 is directly connected configuration with metal wiring 33a～33d High above-mentioned electrostatic removes effect.
In the present embodiment, it is connected and is provided with conductive layer 36 with metal wiring 33a～33d.Conductive layer 36 and metal are joined Line 33a～33d is directly connected to and overlapping, and is continuously provided between adjacent metal wiring 33a～33d when overlooking, There is the area bigger than metal wiring 33a～33d.Conductive layer 36 is for example via the shell of the display device 1 with touching detection function Body etc. is grounded.Therefore, in the case of making metal wiring 33a～33d static electrification after the electromagnetic noises such as electrostatic are from outside intrusion, gold The electrostatic belonging to distribution 33a～33d also flows to conductive layer 36.Thus, conductive layer 36 can at short notice by metal wiring 33a～ The electrostatic that 33d is carried removes.Thus, the display device 1 with touching detection function of present embodiment can improve to electricity such as electrostatic The patience of magnetic noise.
Conductive layer 36 is including such as stannum oxide (sno2) etc. the light transmission of oxide conductive material.Conductive layer 36 can With using described in such as JP 2007-148201 publication, JP 2013-142194 publication, with stannum oxide (sno2) and silicon dioxide (sio2) for the oxide skin(coating) of main component, with gallium oxide (ga2o3), Indium sesquioxide. (in2o3) and oxidation Stannum (sno2) as main material and contain conductive layer of light transmission of silicon (si) etc. for the oxide skin(coating) of main component, using ito. The metal wiring 33a that makes touch detecting electrode tdl be comprised is difficult with above-mentioned oxide material by the conductive layer 36 of main component ～33d goes bad or corrodes.
The sheet resistance value of conductive layer 36 is such as 109ω/more than, 1013ω/below, the thin-layer electric of conductive layer 36 The sheet resistance value of resistance value ratio metal wiring 33a～33d is high.If the scope of this sheet resistance value, then metal wiring 33a～ The electrostatic of 33d flows to conductive layer 36, can remove electrostatic at short notice.And, many metal wiring 33a～33d that In the case of being continuously provided with conductive layer 36 between this, also can prevent from touching detecting electrode tdl short circuit each other, can be based on touch Mutual electrostatic capacitance detection touch input between detecting electrode tdl and drive electrode coml.Additionally, so-called sheet resistance refers to With regard to the resistance value between 2 relative sides of resistive element when overlooking being square shape.The sheet resistance value of conductive layer 36 can use Glass substrate 31 is measured by the conductive layer of the formation such as sputtering method and using known four-terminal method.
Figure 10 is the circuit diagram of the pixel arrangement of the display part with touching detection function representing the 1st embodiment.In Fig. 9 In shown tft substrate 21, it is formed with the thin-film transistor element (below for tft element) of each sub-pixel spix shown in Figure 10 Tr, the pixel signal line sgl that each pixel electrode 22 is supplied with picture element signal vpix, the scan signal line of each tft element tr of driving The distributions such as gcl.Pixel signal line sgl extends in the plane parallel with the surface of tft substrate 21 with scan signal line gcl.
Display floater 20 shown in Figure 10 has the multiple sub-pixel spix with rectangular arrangement.Sub-pixel spix has respectively Standby tft element tr and liquid crystal cell lc.Tft element tr is the element consisting of thin film transistor (TFT), in this embodiment, including n ditch The tft of mos (metal oxide semiconductor: the metal-oxide semiconductor (MOS)) type in road.The source electrode of tft element tr or A side in person's drain electrode is connected with pixel signal line sgl, and grid is connected with scan signal line gcl, another in source electrode or drain electrode One side is connected with one end of liquid crystal cell lc.Another in the source electrode of one end of liquid crystal cell lc and tft element tr or drain electrode Side connects, and the other end is connected with drive electrode coml.
What sub-pixel spix passed through scan signal line gcl and display floater 20 belongs to the other sub-pixel spix phases mutually gone together Connect.Scan signal line gcl is connected with gate drivers 12 (with reference to Fig. 1), supplies scanning signal from gate drivers 12 vscan.In addition, sub-pixel spix passes through the other sub-pixels belonging to same column of pixel signal line sgl and display floater 20 Spix is connected with each other.Pixel signal line sgl is connected with source electrode driver 13 (with reference to Fig. 1), supplies pixel from source electrode driver 13 Signal vpix.And, sub-pixel spix is connected with each other with belonging to the other sub-pixel spix mutually going together by drive electrode coml. Drive electrode coml is connected with drive electrode driver 14 (with reference to Fig. 1), supplies drive signal from drive electrode driver 14 vcom.I.e., in this embodiment, the multiple sub-pixel spix belonging to identical a line have a drive electrode coml.This embodiment party The bearing of trend of drive electrode coml of formula is parallel with the bearing of trend of scan signal line gcl.The drive electrode of present embodiment The bearing of trend not limited to this of coml, the such as bearing of trend of drive electrode coml can also be and the prolonging of pixel signal line sgl Stretch the parallel direction in direction.
Gate drivers 12 shown in Fig. 1 are driven in the way of scanning scan signal line gcl successively.Scanning signal vscan (with reference to Fig. 1) is applied to the grid of the tft element tr of sub-pixel spix, 1 water in sub-pixel spix via scan signal line gcl The object that horizontal line drives as display is selected successively.In addition, the display device 1 with touching detection function passes through source electrode driver 13 pairs are belonged to 1 horizontal sub-pixel spix supply picture element signal vpix and are shown in every time 1 horizontal mode.Entering During this display action of row, drive electrode driver 14 applies drive signal to this 1 horizontal line corresponding drive electrode coml vcom.
Figure 11 is the color region with colored filter for the arrangement of the touch detecting electrode for the 1st embodiment is described The schematic diagram of relation.Colored filter 32 shown in Fig. 9 be periodically arranged for example be colored as red (r), green (g), the 3 of blue (b) Color region 32r, 32g, 32b of the colored filter of color.Color region 32r, 32g, 32b of 3 colors of r, g, b as 1 group with Each sub-pixel spix shown in above-mentioned Figure 10 corresponds to, and color region 32r, 32g, 32b to be constituted pixel p ix as 1 group.As figure Shown in 9, colored filter 32 is relative with liquid crystal layer 6 in the direction vertical with tft substrate 21.If additionally, colored filter 32 Color is different colors, then can also be the combination of other colors.In addition, colored filter 32 be not limited to 3 colors combination or Combinations more than 4 colors.
As shown in figure 11, touch the pitch configuration by regulation for the many metal wiring 33a～33d of detecting electrode tdl, touch Detecting electrode tdl is as overall in the side parallel with the bearing of trend of each color region 32r, 32g, 32b of colored filter 32 To extension.That is, touch detecting electrode tdl to extend in the direction parallel with the direction that the pixel signal line sgl shown in Figure 10 extends. In order that each metal wiring 33a～33d will not block the specific color region of colored filter 32, metal wiring 33a～33d Become the jaggies that the fine rule piece u1 mutually tilting in the opposite direction and fine rule piece u2 is connected repeatedly.Metal wiring 33a～ 33d can also be wave.Fine rule piece u1 is with fine rule piece u2 with respect to parallel with the bearing of trend of color region 32r, 32g, 32b Direction there is angle, θ and mutually tilt in the opposite direction.Fine rule piece u1, u2 be connected position formed bending section 33r, 33s, metal wiring 33a～33d is regularly provided with bending section 33r, 33s.Such as angle, θ is more than 5 degree and less than 75 degree, preferably It is more than 25 degree and less than 40 degree, be further preferred that more than 50 degree and less than 65 degree.
The bearing of trend so touching the metal wiring 33a～33d of detecting electrode tdl is each with respect to colored filter 32 The bearing of trend of color region 32r, 32g, 32b has angle.As a result, the metal wiring 33a of touch detecting electrode tdl～ 33d blocks each color region 32r, 32g, 32b of colored filter 32 in order, so the specific of colored filter 32 can be suppressed The reduction of the absorbance of color region.In addition, the metal wiring 33a～33d touching detecting electrode tdl can also be in preferred model Configure while there is in enclosing variation.That is, touching detecting electrode tdl can also make metal wiring 33a～33d interval each other different.
Drive electrode coml shown in Fig. 7 and Fig. 9 shares as providing to multiple pixel electrodes 22 of display floater 20 The common electrode function of current potential, and also carry out the touch detection based on mutual electrostatic capacitance mode as touch panel 30 When drive electrode function.Figure 12 is the drive electrode of the display part with touching detection function representing the 1st embodiment Axonometric chart with the configuration example touching detecting electrode.Touch panel 30 include located at pixel substrate 2 drive electrode coml and Touch detecting electrode tdl located at opposing substrate 3.
Drive electrode coml is divided into the electrode pattern of multiple striateds of the left and right directions extension in Figure 12.Touch detection The many metals that electrode tdl includes having the direction extension intersecting in the bearing of trend with the electrode pattern of drive electrode coml are joined The electrode pattern of line (omit in fig. 12 and represent).And, touch detecting electrode tdl in the table with tft substrate 21 (with reference to Fig. 9) The vertical direction in face is relative with drive electrode coml.Touch detecting electrode tdl each electrode pattern respectively with touch test section 40 The input of touch detection signal enlarging section 42 connect (with reference to Fig. 1).By drive electrode coml and touch detecting electrode tdl Cross one another electrode pattern produces electrostatic capacitance in its cross section.
Drive electrode coml has the conductive material of light transmission using such as ito etc..Additionally, touching detecting electrode tdl It is not limited to be divided into multiple shapes by striated with drive electrode coml (drive electrode block).For example touch detecting electrode tdl Can also be comb shape with drive electrode coml.As long as or touch detecting electrode tdl and drive electrode coml be divided into many Individual, the shape to the slit that drive electrode coml is split both can be straight line or curve.
According to this composition, when touch panel 30 carries out the touch detection action of mutual electrostatic capacitance mode, drive electrode Driver 14 drives drive electrode coml so that it is scanned successively in the way of timesharing as drive electrode block, thus selects successively to drive 1 detection block of moving electrode coml.And, touch detection signal vdet1 from touching detecting electrode tdl output, thus carry out 1 detection The touch detection of block.That is, drive electrode block is electric with the driving of the ultimate principle touching detection of above-mentioned mutual electrostatic capacitance mode Pole e1 corresponds to, and touch detecting electrode tdl is corresponding with touching detecting electrode e2, and touch panel 30 detects according to this ultimate principle and touches Input.As shown in figure 12, in touch panel 30, cross one another touch detecting electrode tdl and drive electrode coml is by electrostatic Capacitive touch sensors are configured to rectangular.Thus, the touch detection faces covering touch panel 30 are integrally scanned, thus The position touching or proximating to from outside conductor detection can occur.
As one of the method for operating of the display device 1 with touching detection function, the display dress with touching detection function Put 1 to carry out touching detection action (during touching detection) and display action (during display action) by timesharing.Touch detection dynamic Make and display action how separately to carry out can, below in relation to 1 frame of display floater 20 during (during 1f), i.e. in display one Respectively touch detection action and display action are divided into the method repeatedly carrying out in time needed for the video information of picture amount Illustrate.
The signal of of the configuration during Figure 13 is the display action representing during 1 frame and during touch detection action Figure.Pt1, pt2 during during during 1 frame, (1f) includes 2 display actions, pd1, pd2 and 2 touch detection actions, above-mentioned each phase Between be alternately configured on a timeline pd1 during display action, touch pd2 during pt1, display action during detection action, Touch pt2 during detection action.
Control unit 11 (with reference to Fig. 1) via gate drivers 12 and source electrode driver 13 to pd1 during each display action, Pixel p ix (with reference to Figure 10) the supply picture element signal vpix of selected multiple row in pd2.
In addition, control unit 11 (with reference to Fig. 1) via drive electrode driver 14 to pt1 during each touch detection action, In pt2, the supply of selected drive electrode coml (with reference to Figure 12) touches the drive signal vcom of detection.Touch test section 40 Based on the seat carrying out the presence or absence of touch input and input position from the touch detection signal vdet1 touching detecting electrode tdl supply Target computing.
Additionally, in the present embodiment, the common electrode of drive electrode coml dual-purpose display floater 20, therefore control unit 11 It is supplied as display via drive electrode driver 14 to the drive electrode coml selecting in pd1, pd2 during display action to use Common electrode current potential drive signal vcom.
Not using drive electrode coml in touching detection action, only carry out detection action by touching detecting electrode tdl In the case of, for example based on described later from the touch Cleaning Principle of electrostatic capacitance mode carry out touch detection in the case of, drive Galvanic electricity driver 14 can also touch, to touching detecting electrode tdl supply, the drive signal vcom detecting.
In fig. 13, it is divided into the video carrying out 1 picture amount to show in during 1 frame (1f) 2 times but it is also possible to by 1 frame phase Between be divided into more number of times during display action in (1f).With regard to touching during detection action it is also possible to during 1 frame (1f) The more number of times of middle setting.
During touching detection action, pt1, pt2 both can carry out the touch detection of the half of a picture every time respectively, also may be used Detected with the touch carrying out a picture amount respectively.Alternatively, it is also possible to carry out discontinuity detection etc. as needed.Alternatively, it is also possible to not Display action in (1f) during 1 frame and touch detection action are divided into and carry out repeatedly and one after another.
Figure 14 is the process chart of the manufacture method for the conductive layer of the 1st embodiment and touch detecting electrode are described.Figure 14 be Fig. 8 the cut-out of use a-a line after sectional view when the direction of arrow is watched.As shown in figure 14, first, in glass substrate 31 Upper surface use the oxidiferous material of above-mentioned bag formed conductive layer 36, conductive layer 36 is formed using above-mentioned metal material Metal level 133 (step st1).Conductive layer 36 and metal level 133 can be continuously formed in 1 operation using sputtering method etc..
Then, resist 137 (step st2) is formed on metal level 133.Resist 137 is by being lithographically formed pattern, shape The position of the pattern overlapping of metal wiring 33a～33d shown in Cheng Yuyu Fig. 8.
Afterwards, the partial metal layers 133 exposing from resist 137 are passed through etching and remove (step st3).With resist The partial metal layers 133 of 137 overlaps are removed not over etching, are formed as the pattern of metal wiring 33a～33d.In metal Etching solution, the such as phosphoric acid acetic acid of phosphate can be used in the etching solution of layer 133.In the present embodiment, conductive layer 36 uses The conductive material of the oxidiferous light transmission of above-mentioned bag, including polycrystalline structure.Accordingly, with respect to the etching solution of metal level 133, The rate of etch of conductive layer 36 is less than the rate of etch of metal level 133.Not overlapping with resist 137 partial metal layers 133 are being removed When going, conductive layer 36 becomes etching obstacle, can suppress the carrying out etching.Now, not overlapping with resist 137 partially electronically conductive Layer 36 is somewhat etched.
Then, the pattern (step of metal wiring 33a, 33b is formed by removing resist 137 on conductive layer 36 st4).Additionally, in fig. 14, metal wiring 33a, 33b are shown, but can carry out above-mentioned in the entire surface of glass substrate 31 simultaneously Operation.Thus, multiple touch detecting electrode tdl with metal wiring 33a～33d as shown in Figure 8 are formed.
Conductive layer 36 and metal wiring 33a, 33b are formed by above operation, thus as shown in figure 14, conductive layer 36 has Part 1 36a overlapping with metal wiring 33a, 33b and not overlapping with metal wiring 33a, 33b part 2 36b.And, The thickness of part 1 36a of conductive layer 36 is thicker than the thickness of part 2 36b.Conductive layer 36 comprises polycrystalline structure due to using Material, therefore is difficult to be etched with respect to the etching solution of metal level 133.Thus, part 1 36a of conductive layer 36 is not by side Etching, has the width roughly equal with metal wiring 33a, 33b or slightly larger width.Therefore, in conductive layer 36 and metal Pass through on distribution 33a～33d can suppress in the side of part 1 36a and protection during the coating protective layer such as printing 38 (with reference to Fig. 9) Space is produced between layer 38.
In addition, as shown in figure 14, metal wiring 33a, 33b, therefore conductive layer 36 and metal level are formed on conductive layer 36 133 can pass through sputtering method etc. is continuously formed (with reference to step st1 of Figure 14) in 1 operation.Accordingly, it is capable to suppress for being formed The increase of the sputtering process of conductive layer 36, can suppress the increase of manufacturing cost.
(embodiment)
Figure 15 is the touch detecting electrode of the display device with touching detection function of the embodiment representing present embodiment Schematic plan view.Figure 16 is the table of the configuration area occupation ratio representing and touching detecting electrode and the relation touching detection action.Figure 16 Table 1 represent that the display touching detection function for the band making live width l of metal wiring 33a～33d and interval width s change fills Put 1 and can detect the position that the conductors such as finger touch or proximate to." ok " of Figure 16 represents the position that can detect touch input Put, " ng " represents the position being difficult to detect touch input.
Additionally, live width l represents the width in the direction orthogonal with the bearing of trend of metal wiring 33a～33d as shown in figure 15, Interval width s represents in the direction orthogonal with the bearing of trend of metal wiring 33a～33d, between adjacent metal wiring Distance.Configuration area occupation ratio represents the area touching detecting electrode tdl (metal wiring 33a～33d) with respect to conduction when overlooking The ratio shared by area of layer 36.It is also possible to by 4 metal wirings for example as shown in the region s1 being represented with the dotted line of Figure 15 The region of inclusion fine rule piece u1, u2 of 33a～33d is set to unit area.
As shown in the table 1 of Figure 16, in the case that live width l is set to 4 μm, interval width s is more than 37.5 μm, can detect Go out the position of touch input, in the case that live width l is set to 10 μm, interval width s is more than 90 μm, can detect that touch is defeated The position entering.That is, in the case of being below 10% in the configuration area occupation ratio touching detecting electrode tdl, touch input can be detected Position.In addition, live width l be 2.25 μm and interval width s be 250 μm in the case of, that is, touching the joining of detecting electrode tdl Put in the case that area occupation ratio is more than 0.89%, the position of touch input can be detected.
As shown in the table 1 of Figure 16, live width l be 4 μm, interval width s be below 35 μm in the case of, be difficult detection and touch The position of input.In the case that live width l is set to 10 μm, interval width s is less than 80 μm, is difficult to detect the position of touch input Put.Its reason is that, when the configuration area occupation ratio touching detecting electrode tdl is more than 10%, there is metal wiring each other via conduction Layer 36 conducting, the probability that adjacent touchs a detecting electrode tdl part each other turns on.
As implied above according to the present embodiment, by arranging conductive layer 36 with by way of being connected with metal wiring 33a～33d, So as to make intrusion metal wiring 33a～33d's to flow to conductive layer 36 from outside electrostatic etc., and by detection will be touched The configuration area occupation ratio of electrode tdl is set to less than 10%, so as to suppress touch detecting electrode tdl to turn on each other, can detect touch Input position.
(the 2nd embodiment)
Figure 17 is the schematic plan view of of the display device with touching detection function representing the 2nd embodiment.Figure 18 is the sectional view of the outline cross section structure of the display device with touching detection function representing the 2nd embodiment.As Figure 17 institute Show, touch detecting electrode tdl and there are many metal wiring 33a～33d in a same manner as in the first embodiment.As shown in figure 18, this enforcement The difference of display device 1a with touching detection function of mode is: press on glass substrate 31 touch detecting electrode tdl, The order stacking of conductive layer 36.That is, located at the top of glass substrate 31, conductive layer 36 is at least located at gold for metal wiring 33a～33d Belong on distribution 33a～33d.
As shown in figure 17, conductive layer 36 is located at the substantially entire surface of glass substrate 31, multiple touch detecting electrode tdl, Overlapping on welding disk 34a, 34b and distribution 37.A part in the periphery of conductive layer 36 is provided with the recess 36c caving inward, The position overlapping with recess 36c, a part for distribution 37 is exposed.The distribution 37 exposing in the position of recess 36c and flexible printing Substrate 71 is connected.
In the present embodiment, it is also that conductive layer 36 is continuously provided between adjacent metal wiring 33a～33d, and It is directly connected to metal wiring 33a～33d and overlapping with metal wiring 33a～33d.Conductive layer 36 has ratio metal wiring 33a The big area of～33d.Therefore, the electromagnetic noises such as electrostatic from outside invade and with metal wiring 33a～overlapping situation of 33d Under, the electrostatic that metal wiring 33a～33d is carried also flows to conductive layer 36.Thus, conductive layer 36 can be by metal wiring 33a～33d The electrostatic being carried removes at short notice.Thus, display device 1a with touch detection function of present embodiment is to electrostatic etc. Patience from outside noise improves.
In the present embodiment, conductive layer 36, on metal wiring 33a～33d, therefore has protection metal wiring 33a concurrently The function of the protective layer of～33d.Thus, display device 1a with touching detection function can omit the protective layer 38 shown in Fig. 9, It is provided with polarization plates 35 across adhesive linkage 39 on conductive layer 36.In addition, in metal wiring 33a～be provided between 33d and adhesive linkage 39 Conductive layer 36, therefore can suppress corrosion to metal wiring 33a～33d of being led to by the composition of adhesive linkage 39 etc..In addition, conduct The restriction of the material that adhesive linkage 39 uses tails off.
Conductive layer 36 can also be formed by sputtering method using the conductive material of above-mentioned light transmission.In this case, Need with being formed from metal wiring 33a～different operation of 33d.In addition, conductive layer 36 can also use comprises above-mentioned light transmission The resin material of conductive material and formed by the coating such as print process.In this case, the increasing of manufacturing cost can be suppressed Greatly.
(the 3rd embodiment)
Figure 19 is the schematic plan view of of the display device with touching detection function representing the 3rd embodiment.Figure 20 be by the 3rd embodiment with touch detection function display device touch detecting electrode partly amplify after expression show Meaning plane graph.Figure 21 is the section of the outline cross section structure of the display device with touching detection function representing the 3rd embodiment Figure.
In the display device 1 with touch detection function of the 1st embodiment and the 2nd embodiment, 1a, band touches detection The drive electrode coml of the display part 10 of function is as the shared current potential of multiple pixel electrodes 22 offer to display floater 20 Common electrode function, and also carry out the drive during touch detection based on mutual electrostatic capacitance mode as touch panel 30 Moving electrode function.Display device 1b with touching detection function of the 3rd embodiment assembles touch on display floater 20 Panel 30, touch panel 30 is carried out based on the touch detection from electrostatic capacitance mode.
As shown in figure 19, the touch detecting electrode tdla of present embodiment includes the multiple small electrode portions by matrix configuration ta.Multiple small electrode portion ta have the many metal wiring 33e extending in the direction of the minor face along viewing area 10a and metal Distribution 33f.Metal wiring 33e and metal wiring 33f is jaggies or wave, is to be put down with the minor face with viewing area 10a The straight line of row is the symmetrical shape of the line of axis of symmetry.Metal wiring 33e and metal wiring 33f is in the length along viewing area 10a The direction on side is alternately arranged, and forms cancellous metal wiring in the substantially entire surface of viewing area 10a.
As shown in figure 19, metal wiring 33e, 33f passes through the slit at the position shown in located at dotted line 51a and located at dotted line The slit at the position shown in 51b is electrically separated with metal wiring 33e, 33f of adjacent small electrode portion ta.Thus, multiple small electrodes Portion ta is separated from each other and with rectangular configuration.Multiple small electrode portion ta respectively via located at frame region 10b distribution 37a with scratch Property printed base plate 71 connects.Multiple small electrode portion ta touch respectively as touching detecting electrode function, the band of present embodiment Display device 1b touching detection function can be based on multiple small electrode portion ta from electrostatic capacitance detection connecing from outside conductor Touch or close.Multiple small electrode portion ta respectively constitute electrostatic capacitance touch sensor, are joined with rectangular in the 10a of viewing area Put, therefore can be scanned detecting the conductor occurring from outside by covering the touch detection faces entirety of touch panel 30 The position touching or proximating to.
Then, with reference to display device 1b with touch detection function for Figure 22～Figure 24 explanation present embodiment from electrostatic The ultimate principle touching detection of capacitive way.Figure 22 is the ultimate principle touching detection for explanation from electrostatic capacitance mode , represent finger and be not in contact with or close state explanatory diagram.Figure 23 is the touch for explanation from electrostatic capacitance mode Explanatory diagram ultimate principle, representing the state that finger touchs or proximates to of detection.Figure 24 is to represent drive signal and touch The figure of of the waveform of detection signal.Additionally, Figure 22 and Figure 23 illustrates testing circuit in the lump.
As shown in figure 22, in the state of finger is not in contact with or is close, apply regulation to touching detecting electrode e2 The ac square wave sg of frequency (for example counting khz～hundreds of khz degree).Touch detecting electrode e2 and there is electrostatic capacitance c3, and quiet The corresponding electric current flowing of electric capacity c3.The variation of electric current corresponding with ac square wave sg is converted to electricity by voltage detector det Variation (the waveform v of solid line of pressure4(with reference to Figure 24)).
Then, as shown in figure 23, in the state of finger touchs or proximates to, between finger and touch detecting electrode e2 Electrostatic capacitance c4 is applied to electrostatic capacitance c3 touching detecting electrode e2.Thus, exchange square is being applied to touch detecting electrode e2 During shape ripple sg, electric current flowing corresponding with electrostatic capacitance c3 and c4.As shown in figure 24, voltage detector det will with exchange rectangle The variation of the corresponding electric current of ripple sg is converted to variation (the waveform v of dotted line of voltage5).And, respectively to obtained waveform v4With Waveform v5Magnitude of voltage be integrated, relatively above-mentioned value, thus, it is possible to distinguish that finger to the contact touching detecting electrode e2 or connects The presence or absence of near.Additionally, in fig. 24 or with regard to waveform v4With waveform v5Obtain until being reduced to the reference voltage of regulation Period and relatively above-mentioned period etc. method.
Specifically, as shown in Figure 22 and Figure 23, touching detecting electrode e2 is can be by switching sw1 and switch sw2 and electricity Source and the separate respectively composition of voltage detector det.In fig. 24, in moment t01Timing, ac square wave sg makes to be equivalent to Voltage v0Voltage level rise.Now, switch sw1 connects, and switch sw2 disconnects.Therefore touch the voltage of detecting electrode e2 Rise to voltage v0.Then, in moment t11Timing before will switch sw1 disconnect.Although it is floating for now touching detecting electrode e2 Configuration state, but by touching electrostatic capacitance c3 (with reference to Figure 22) of detecting electrode e2 or the electrostatic electricity touching detecting electrode e2 Holding c3 and adding is made by the electric capacity (c3+c4, with reference to Figure 23) obtained by electrostatic capacitance c4 touching or proximating to lead to of finger etc. The current potential touching detecting electrode e2 can maintain v0.And, in moment t11Timing before make switch sw3 connect and through regulation Time after so that it is disconnected and make voltage detector det reset.Output voltage is made to become with vref substantially by this replacement action Equal voltage.
Next, in moment t11Timing make switch sw2 connect when, the reversion input unit of voltage detector det becomes tactile Touch the voltage v of detecting electrode e20, afterwards, the reversion input unit of voltage detector det is according to the electrostatic electricity touching detecting electrode e2 Hold the time constant of electric capacity c5 in c3 (or c3+c4) and voltage detector det and be reduced to reference voltage vref.Now, Electric capacity in voltage detector det is moved to by the electric charge that electrostatic capacitance c3 (or c3+c4) touching detecting electrode e2 is put aside The output of c5, therefore voltage detector det rises (vdet2).The output (vdet2) of voltage detector det does not have in finger etc. Close to when touching detecting electrode e2, become waveform v indicated by the solid line4So that vdet2=c3 × v0/c5.It is being applied in by handss During the electric capacity that the impact of finger etc. brings, become the waveform v being represented by dashed line5So that vdet2=(c3+c4) × v0/c5.
Afterwards, the electric charge in electrostatic capacitance c3 (or c3+c4) touching detecting electrode e2 fully moves to electric capacity c5 The timing of moment t31 afterwards makes switch sw2 disconnect, and so that switch sw1 is connected with switch sw3, thus makes touch detecting electrode e2's Current potential becomes for the low level of same potential and makes voltage detector det reset with ac square wave sg.Additionally, now, make If after the timing that switch sw1 connects makes switch sw2 disconnect and being moment t02In the past, then can be arbitrary timing.In addition, making electricity If after the timing that pressure detector det resets makes switch sw2 disconnect and being moment t12In the past, then arbitrary timing can be set to.Will Above action is repeated by the frequency (for example counting khz～hundreds of khz degree) of regulation.Waveform v can be based on4With waveform v5Difference Absolute value | δ v | come to measure outside close to the presence or absence of object the presence or absence of (touch).Additionally, touching the current potential of detecting electrode e2 as schemed Become v when finger etc. is not close to shown in 242Waveform, when being applied in electrostatic capacitance c4 brought by the impact of finger etc. Become v3Waveform.Also can be by measuring waveform v2With waveform v3Drop to the voltage v of regulation respectivelythTime measure outside Close to the presence or absence of object (the presence or absence of touch).
In the present embodiment, the driving letter of drive electrode driver 14 supply according to from Fig. 1 for the touch panel 30 Number vx supplies electric charge respectively to multiple small electrode portion ta, carries out based on the touch detection from electrostatic capacitance mode.Multiple small electrodes Portion ta will touch detection signal vdet2 respectively and export touch test section 40, touch test section 40 and carry out the presence or absence of touch input Computing with the coordinate of input position.
Then, the detailed composition of the touch detecting electrode tdla of present embodiment is described.Additionally, in fig. 20, will be with The orthogonal direction (bearing of trend of scan signal line gcl) of the orientation of the sub-pixel spix shown in Figure 10 is as the 1st direction Dx, the orientation (bearing of trend of pixel signal line sgl) of sub-pixel spix is represented as the 2nd direction dy.
As shown in figure 20, the touch detecting electrode tdla of present embodiment include small electrode portion ta11, ta21, ta31, ta12、ta22、ta32.Small electrode portion ta11 is included in the plane parallel with opposing substrate 3 (with reference to Figure 21) in the 2nd direction dy The many metal wiring 33e extending and Duo Gen metal wiring 33f.Many metal wiring 33e and Duo Gen metal wiring 33f are configured to In the 1st direction dx alternately side by side and combine.Many metal wiring 33e and Duo Gen metal wiring 33f are formed from the same material, And use above-mentioned metal material.
In the many metal wiring 33e and Duo Gen metal wiring 33f of the 1st direction dx arrangement, the bending of metal wiring 33e Portion is combined with the bending section of metal wiring 33f, forms cross part tdx.Many metal wiring 33e and Duo Gen metal wiring 33f lead to Cross cross part tdx conducting.Thus, metal wiring 33e and metal wiring 33f forms the bag being surrounded by fine rule piece ua and fine rule piece ub Enclose region mesh1.Additionally, metal wiring 33e and metal wiring 33f can not also be connected by bending section.For example can also be by The pars intermedia of the fine rule piece ub of the pars intermedia of fine rule piece ua of metal wiring 33e and metal wiring 33f connects and turns on.Additionally, The direction that metal wiring 33e, 33f extend is to connect the square end portion in 1 metal wiring 33e, 33f and the opposing party end The direction of straight line.Or the direction that metal wiring 33e, 33f extend is the 2nd direction dy.In addition, metal wiring 33e, 33f are saws Tooth trace or wave.Small electrode portion ta21, ta31, ta12, ta22, ta32 also have the structure same with small electrode portion ta11 Become.
Small electrode portion ta11 is combined with portion of terminal te1 being formed at frame region 10b by wiring part tb11.Wiring part Tb11 is configured to multiple fine rule piece ua and multiple fine rule piece ub in the 2nd direction dy alternately side by side and combine, from small electrode portion Ta11 extends to frame region 10b in the 2nd direction dy.Small electrode portion ta21 passes through from small electrode portion ta21 to frame region 10b The wiring part tb21 extending in the 2nd direction dy is combined with portion of terminal te2 being formed at frame region 10b.Small electrode portion ta12 leads to Cross the wiring part tb12 extending in the 2nd direction dy from small electrode portion ta12 to frame region 10b and be formed at frame region 10b Portion of terminal te4 combines.Small electrode portion ta22 passed through from small electrode portion ta22 to frame region 10b in joining that the 2nd direction dy extends Line portion tb22 is combined with portion of terminal te5 being formed at frame region 10b.Wiring part tb21, tb12, tb22 and wiring part tb11 are same Sample is configured to multiple fine rule piece ua and multiple fine rule piece ub in the 2nd direction dy alternately side by side and combine.Additionally, small electrode portion Ta31 is located at the end of viewing area 10a, therefore constitutes metal wiring 33e, 33f of small electrode portion ta31 not by wiring part Be formed at portion of terminal te3 of frame region 10b directly in conjunction with.Similarly, constitute small electrode portion ta32 metal wiring 33e, 33f due to small electrode portion ta32 be located at viewing area 10a end, so not by wiring part be formed at frame region Portion of terminal te6 of 10b directly in conjunction with.Portion of terminal te1～te6 is connected respectively with the distribution 37a shown in Figure 19.
Dummy electrodes tdd includes fine rule piece uc and fine rule piece ud.Fine rule piece uc has the shape roughly the same with fine rule piece ua Shape.Fine rule piece ud has and fine rule piece ub same shape.Fine rule piece uc is abreast configured with fine rule piece ua, fine rule piece ud Abreast configure with fine rule piece ub.In addition, fine rule piece uc and fine rule piece ud is to be surrounded by 2 fine rule piece uc and 2 fine rule piece ud The area of enclosing region mesh2 configure with enclosing region mesh1 identical mode.Thus, the display with touching detection function The light-proofness being configured with the region touching detecting electrode tdla and being not configured with the region of touch detecting electrode tdla of device 1b Difference diminish, therefore can reduce can easily see touch detecting electrode tdla probability.
According to above-mentioned composition, though the display device 1b metal wiring 33e with touching detection function of the 3rd embodiment and A part for side's metal wiring in metal wiring 33f attenuates, it is unreliable, due to by cross part tdx and the opposing party to turn on Metal wiring connects, and therefore also can improve the accuracy rate touching detection.
As shown in figure 21, conductive layer 36 is located at touching between detecting electrode tdla and glass substrate 31, electric with touching detection Metal wiring 33e, 33f of pole tdla is directly connected to and overlapping.Conductive layer 36, located at the substantially entire surface of glass substrate 31, is covered The entire surface of viewing area 10a shown in Figure 19 and Figure 20 and frame region 10b are continuously provided.That is, conductive layer 36 and Figure 20 Shown each small electrode portion ta11～ta32, dummy electrodes tdd and portion of terminal te1～te6 is overlapping.
Even the composition of the touch detecting electrode tdla of present embodiment, due to being provided with conductive layer 36, so in electrostatic In the case of being externally entering metal wiring 33e, 33f, the electrostatic of metal wiring 33e, 33f also flows to conductive layer 36.Accordingly, it is capable to Remove the electrostatic of metal wiring 33e, 33f at short notice.
In addition, as shown in figure 20, display device 1b with touching detection function of present embodiment has multiple virtual electricity Pole tdd.Dummy electrodes tdd is not as the electrode touching detecting electrode function, with each small electrode portion ta11～ta32, end Sub-portion te1～te6, wiring part tb11～tb22 separate configuration.Therefore, in the case of assuming to be not provided with conductive layer 36, quiet When outside intrusion dummy electrodes tdd dummy electrodes tdd is powered, the electric charge of dummy electrodes tdd is difficult to flow to outside electricity.Cause This, it is difficult that the electrostatic of dummy electrodes tdd is removed, and there is the aobvious of display floater 20 due to the electrostatic of dummy electrodes tdd Show the probability that the probability of quality reduction or the touch accuracy of detection of touch panel 30 reduce.In the present embodiment, conductive Layer 36 is connected with dummy electrodes tdd, overlaps with dummy electrodes tdd, therefore the electrostatic of dummy electrodes tdd is in conductive layer 36 Flowing.Accordingly, it is capable to the electrostatic of dummy electrodes tdd is removed at short notice.Thus, the band of present embodiment touches detection function Display device 1b the patience of the electromagnetic noises such as electrostatic is improved.
Display device 1b with touching detection function of present embodiment is electric from electrostatic based on touch detecting electrode tdla Hold and carry out touching detection.Therefore, as shown in figure 21, tft substrate 21 is provided with and replaces being total to of drive electrode coml (with reference to Fig. 9) With electrode 23.Common electrode 23 is the electrode of the current potential shared for multiple pixel electrodes 22 offer to display floater 20, It is continuously provided on tft substrate 21.
In the present embodiment it is also possible to display action is carried out and based on the touch inspection from electrostatic capacitance mode by timesharing Survey action.As described above, in pt1, pt2 during touching detection, touching detecting electrode tdla supply drive signal vx.Share electricity Pole 23 during touching detection in pt1, pt2 can not applied voltage signal, and current potential is set to revocable floating.In addition, Common electrode 23 can also apply with drive signal vx to be the voltage signal of same level with drive signal vx simultaneously, as actively Shield guard.
Additionally, in the present embodiment or, replace common electrode 23 tft substrate 21 side arrange drive electrode Coml (with reference to Fig. 9), carries out touching detection based on the mutual electrostatic capacitance of drive electrode coml and touch detecting electrode tdla.
(the 4th embodiment)
Figure 25 is the schematic plan view of of the display device with touching detection function representing the 4th embodiment.Figure 26 is by the diagrammatic plan touching expression after detecting electrode amplifies of the display device with touching detection function for the 4th embodiment Figure.Figure 27 be Figure 26 the cut-out of use b-b line after schematic section when the direction of arrow is watched.Figure 28 is to represent the 4th embodiment party The sectional view of the outline cross section structure of the display device with touching detection function of formula.
As shown in figure 25, present embodiment with touch detection function display device 1c in, with glass substrate 31 Parallel the same face is provided with drive electrode comlb and touches detecting electrode tdlb.
Drive electrode comlb includes multiple small electrode portion tc.Small electrode portion tc is diamond shape, and multiple small electrode portion tc exist Direction arrangement along the minor face of viewing area 10a.Multiple small electrodes in the arrangement of the direction of the minor face along viewing area 10a Portion tc is connected by electric bridge portion 52 each other.As shown in figure 28, drive electrode comlb and touch detecting electrode tdlb are provided with protection Layer 38, electric bridge portion 52 is on protective layer 38.Drive electrode comlb and electric bridge portion 52 located at different layers, by located at protection The through hole 38a electrical connection of layer 38.1 drive electrode comlb is by the arrangement of the direction of the minor face along viewing area 10a and by electricity The string small electrode portion tc that bridge portion 52 connects is formed.And, multiple drive electrode comlb are on the long side along viewing area 10a Direction arrangement.
Touch detecting electrode tdlb and include multiple small electrode portion td.Small electrode portion td is the little electricity with drive electrode comlb The diamond shape of the roughly equal flat shape of pole portion tc.Multiple small electrode portion td are in the side on the long side along viewing area 10a To arrangement, it is connected with each other in the position overlapping with electric bridge portion 52.1 touches detecting electrode tdlb by along viewing area 10a Long side direction arrangement multiple small electrode portion td formed.And, multiple touch detecting electrode tdlb are along viewing area The direction arrangement of the minor face of 10a.
As shown in figure 25, drive electrode comlb and touch detecting electrode tdlb has in the minor face along viewing area 10a Direction extend many metal wiring 33g and metal wiring 33h.Metal wiring 33g and metal wiring 33h be jaggies or Wave, is the symmetrical shape of line with the straight line parallel with the minor face of viewing area 10a as axis of symmetry.Metal wiring 33g and Metal wiring 33h is alternately arranged in the direction on the long side along viewing area 10a, in the substantially entire surface of viewing area 10a The cancellous metal wiring of middle formation.Many metal wiring 33g and metal wiring 33h pass through located at Figure 25 along dotted line 51c, The slit of the position of 51d is electrically separated with the metal wiring 33g positioned at other small electrode portion tc and metal wiring 33.Drive electrode The small electrode portion td of the small electrode portion tc of comlb and touch detecting electrode tdlb is included by slit detached metal wiring 33g With metal wiring 33h.
Drive electrode comlb is connected with distribution 37b in the long side of viewing area 10a.In addition, touching detecting electrode tdlb It is connected with distribution 37b in the short brink of viewing area 10a.Distribution 37b located at frame region 10b, by drive electrode comlb with scratch Property printed base plate 71 connects, and will touch detecting electrode tdlb and flexible printing substrate 71 connects.
Display device 1c with touching detection function of present embodiment is based on drive electrode comlb and touches detecting electrode The mutual electrostatic capacitance of tdlb carries out the detection that outside conductor touchs or proximates to position.Touch panel 30 is based on according to above-mentioned Mutually electrostatic capacitance mode touch the ultimate principle of detection to detect touch input.
Then, the drive electrode comlb of present embodiment and the detailed composition touching detecting electrode tdlb are described.As figure Shown in 26, drive electrode comlb includes small electrode portion tc1, tc2, tc3.Touch detecting electrode tdlb include small electrode portion td1, td2.The small electrode portion td1 touching detecting electrode tdlb includes the many metal wiring 33g and Duo Gen gold in the 2nd direction dy extension Belong to distribution 33h.Many metal wiring 33g and Duo Gen metal wiring 33h are configured to combine side by side in the 1st direction dx.Many gold Belong to distribution 33g and Duo Gen metal wiring 33h identical material is formed, and use above-mentioned metal material.
In the many metal wiring 33g and Duo Gen metal wiring 33h of the 1st direction dx arrangement, the bending of metal wiring 33g The bending section of portion and metal wiring 33h combines, and forms cross part tdx.Many metal wiring 33g and Duo Gen metal wiring 33h lead to Cross cross part tdx conducting.Thus, metal wiring 33g and metal wiring 33h forms the bag being surrounded by fine rule piece ue and fine rule piece uf Enclose region mesh3.Additionally, metal wiring 33g and metal wiring 33h can not also be connected by bending section.For example can also be by gold Belong to the pars intermedia of fine rule piece ue of distribution 33g and the pars intermedia of the fine rule piece uf of metal wiring 33h connects and turns on.Additionally, it is golden Belong to the direction that distribution 33g, 33h extend be by the square end portion in 1 metal wiring 33g, 33h and the opposing party end connect straight The direction of line.Or the direction that metal wiring 33g, 33h extend is the 2nd direction dy.In addition, metal wiring 33g, 33h are sawtooth Line or wave.Small electrode portion tc1, tc2, tc3 of small electrode portion td2 and drive electrode comlb also have and small electrode portion The same composition of td1.
As shown in figure 26, small electrode portion td1 and small electrode portion td2 in the position overlapping with electric bridge portion 52 by metal wiring 33g, 33h connect.As shown in figure 27, electric bridge portion 52 is arranged at intervals in top with touching detecting electrode tdlb.Drive electrode Connection electrode 52a that the small electrode portion tc1 of comlb and small electrode portion tc2 passes through in through hole 38a respectively is connected with electric bridge portion 52. Thus, small electrode portion tc1 and small electrode portion tc2 connects via electric bridge portion 52.Additionally, electric bridge portion 52 can be had using ito etc. The conductive material of photosensitiveness.In addition, connection electrode 52a can utilize being formed in same operation with electric bridge portion 52 identical material. In addition, electric bridge portion 52 and connection electrode 52a can also use and metal wiring 33g, 33h identical metal material.
Adjacent small electrode portion tc2 and small electrode portion position shown in dotted line 51c, 51d of Figure 26 for the td1 are passed through located at gold The slit belonging to distribution 33g, 33h is electrically separated.Similarly, adjacent small electrode portion tc2 and td2 pass through located at metal wiring 33g, The slit of 33h is electrically separated.So each small electrode portion tc separates with each small electrode portion td, in the small electrode portion of drive electrode comlb Form electrostatic capacitance between tc and the small electrode portion td of touch detecting electrode tdlb adjacent with small electrode portion tc.
As shown in figure 28, conductive layer 36 is directly connected to and overlapping with drive electrode comlb and touch detecting electrode tdlb.Lead Electric layer 36, located at the top of glass substrate 31, is provided with drive electrode comlb on conductive layer 36 and touches detecting electrode tdlb.Lead Electric layer 36, located at the substantially entire surface of glass substrate 31, covers the viewing area 10a shown in Figure 25 and frame region 10b continuously Setting.That is, conductive layer 36 and shown in Figure 26, each small electrode portion tc1～tc3, td1, td2 each metal wiring 33g, 33h connect Connect and overlapping.
Even the composition of the touch detecting electrode tdlb of present embodiment, due to straight with many metal wirings 33g, 33h Connect and be provided with conductive layer 36 in succession, therefore in electrostatic in the case of outside intrusion metal wiring 33g, 33h, metal wiring 33g, The electrostatic of 33h also flows to conductive layer 36.Accordingly, it is capable to the electrostatic of metal wiring 33g, 33h is removed at short notice.
In the present embodiment, drive electrode comlb is provided with the same face parallel with glass substrate 31 and touches inspection Survey electrode tdlb.Therefore, as shown in figure 22, the shared electricity replacing drive electrode coml (with reference to Fig. 9) is provided with tft substrate 21 Pole 23.Common electrode 23 is the electrode of the current potential shared for multiple pixel electrodes 22 offer to display floater 20, in tft base It is continuously provided on plate 21.
Above although the description of embodiment preferred for this invention, but the invention is not restricted to above-mentioned embodiment.? Content disclosed in embodiment is only one eventually, can carry out various changes without departing from the scope of spirit of the present invention. The suitable change carrying out without departing from the scope of spirit of the present invention falls within the technical scope of the present invention certainly.
For example, metal wiring 33a～shape of 33h, live width, interval width can suitably be changed.In addition, shown in Figure 20 Metal wiring 33e and metal wiring 33f are that the line with the straight line parallel with the 2nd direction dy as axis of symmetry is symmetrical, shown in Figure 26 Metal wiring 33g and metal wiring 33h are that the line with the straight line parallel with the 2nd direction dy as axis of symmetry is symmetrical, but not limited to this, It can also be asymmetrical shape.
In the 3rd embodiment, as shown in figure 20 although void is being arranged on detecting electrode tdla identical plane with touching Intend electrode tdd, but in the 1st embodiment, the 2nd embodiment and the 4th embodiment display dress with touching detection function Put in 1,1a, 1c it is also possible to arrange dummy electrodes tdd.For example both can the adjacent metal wiring 33a～33d shown in Fig. 8 Configuration dummy electrodes tdd is it is also possible to configure dummy electrodes tdd each other in adjacent touch detecting electrode tdl each other. In addition, both can enclosing region mesh3 surrounded by fine rule piece ue and fine rule piece uf shown in Figure 26 inner side configuration virtual Electrode tdd it is also possible to metal wiring 33g, 33h a part of electrically separated in small electrode portion will be constituted and as dummy electrodes tdd.
Description of reference numerals
1st, 1a, 1b, 1c display device with touching detection function
2 pixel substrate 3 opposing substrate
The display part with touching detection function for 6 liquid crystal layers 10
10a viewing area 10b frame region
11 control unit 12 gate drivers
13 source electrode driver 14 drive electrode driver
20 display floater 21tft substrates
22 pixel electrode 30 touch panel
31 glass substrate 32 colored filter
33a～33h metal wiring 33r, 33s bending section
36 conductive layer 36a part 1s
36b part 2 36c recess
37th, 37a, 37b distribution 38 protective layer
40 touch test section 42 touches detection signal enlarging section
43a/d converter section 44 signal processing part
45 coordinate extracting part 46 detects timing control part
52 electric bridge portion 133 metal level
137 resist coml, comlb drive electrodes
During gcl scan signal line pd shows
Pt touches pix pixel during detection
Sgl pixel signal line spix sub-pixel
Ta, ta11～ta32, tc, td small electrode portion
Tdl, tdla, tdlb touch detecting electrode
Tdx cross part tr tft element
U1, u2, ua, ub, uc, ud, ue, uf fine rule piece
Vcom, vx drive signal vdet1, vdet2 touch detection signal
Vdisp video signal vpix picture element signal
Vscan scanning signal
Mesh1, mesh2, mesh3 enclosing region

Claims (17)

1. a kind of touch detecting apparatus are it is characterised in that possess:
Substrate；
Touch detecting electrode, located at the face of described substrate-parallel on, there are many metal wirings, many described metal wirings with The mode at setting interval configures；And
Conductive layer, has the sheet resistance value higher than described metal wiring, is connected with described metal wiring and joins with described metal Line overlap.
2. touch detecting apparatus according to claim 1, wherein
, located at the top of described substrate, described metal wiring is on described conductive layer for described conductive layer.
3. touch detecting apparatus according to claim 1, wherein
, located at the top of described substrate, described conductive layer is on described metal wiring for described metal wiring.
4. touch detecting apparatus according to claim 1, wherein
The sheet resistance value of described conductive layer is 109ω/more than, 1013ω/below.
5. touch detecting apparatus according to claim 2, wherein
Described conductive layer have in the viewing area for display image the part 1 overlapping with described metal wiring and not with The overlapping part 2 of described metal wiring.
6. touch detecting apparatus according to claim 5, wherein
The described part 1 of described conductive layer is compared with described part 2 in the direction vertical with respect to the surface of described substrate On thickness thicker.
7. touch detecting apparatus according to claim 1, wherein
Described conductive layer is located at the entire surface of the viewing area for display image.
8. touch detecting apparatus according to claim 1, wherein
With respect to the described conductive layer in the viewing area for display image vertical view when area, the face of described metal wiring Long-pending shared area occupation ratio is less than 10%.
9. touch detecting apparatus according to claim 1, wherein
Described conductive layer includes polycrystalline structure.
10. touch detecting apparatus according to claim 9, wherein
Described metal wiring forms pattern by etching metal level, for the etching solution of described metal level, described conductive layer Rate of etch is less than the rate of etch of described metal level.
11. touch detecting apparatus according to claim 1, wherein
In many described metal wirings each other, it is provided with and separate with described metal wiring and touch detection electricity not as described The dummy electrodes of pole function.
12. touch detecting apparatus according to claim 1, wherein
Described metal wiring will be formed at least one the 1st fine rule piece of the 1st angle and forms the with described 1st direction with the 1st direction At least one the 2nd fine rule piece of 2 angles connects.
A kind of 13. display devices with touch detection function are it is characterised in that have:
Claim 1 is to the touch detecting apparatus described in any one of claim 12；
Multiple pixel electrodes, join relative with described touch detecting electrode with the face of described substrate-parallel and by matrix form Put；And
Display function layer, plays image display function based on picture signal.
14. display devices with touching detection function according to claim 13, have
Drive electrode, located at the face of described substrate-parallel on, and described touch detecting electrode between formed electrostatic capacitance, wherein
Carry out touching detection action and display action by time-sharing format, described touch detection action is that described drive electrode is applied Plus drive signal, detect touch input based on from the described touch detection signal touching detecting electrode, described display action is Supply picture element signal to described pixel electrode and make described display function layer play image display function.
15. display devices with touching detection function according to claim 13, wherein
Carry out touching detection action and display action by time-sharing format, described touch detection action is to touch detection electricity to described Pole applies drive signal, and based on from the described touch detection signal detection touch input touching detecting electrode, described display is moved Work is to make described display function layer play image display function described pixel electrode supply picture element signal.
16. display devices with touching detection function according to claim 13, wherein
Described conductive layer and described touch detecting electrode are configured in the way of directly contact.
17. display devices with touching detection function according to claim 13, also include
Polarization plates, configure by the top than described display function layer, wherein
Described substrate, described conductive layer and the configuration of described touch detecting electrode described display function layer and described polarization plates it Between.
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US20190095035A1 (en) 2019-03-28
US10156929B2 (en) 2018-12-18
JP2017021531A (en) 2017-01-26

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